Successful cryopreservation requires understanding the science behind cellular protection, knowing which applications demand a particular approach and having quality equipment to do the job. This guide provides a practical overview of the process, its clinical and research applications and the equipment needed to implement it in your lab.
What Is Cryo-Freezing?
Cryo-freezing is the process of cooling biological materials to ultra-low temperatures to preserve them and maintain their properties without harming them. The tricky part is preventing your samples from becoming cellular Swiss cheese along the way.
When you freeze biological material, water inside and around cells forms sharp crystals that are absolutely lethal to delicate cell membranes. They expand and pierce through cellular structures, rupturing and destroying them.
This ice formation is the primary challenge in cryopreservation, causing physical damage from crystal growth and osmotic shock as water leaves cells to join growing ice crystals outside.
Vitrification and Cryoprotectants
Vitrification, a solution to ice formation, has revolutionized cryopreservation. By racing past the temperature range where crystals can form, vitrification prevents crystallization, instead turning cellular water into a glass-like solid.
While the cooling rates for successful vitrification can vary depending on the application and sample characteristics, techniques often achieve extremely rapid cooling. For example, in some cryopreservation protocols for small volumes, cooling rates can reach 7,950° C per minute, enabling the vitrification of specimens like single-celled embryos in the presence of high concentrations of cryoprotective agents.
Making this possible are cryoprotective agents, the unsung heroes of the process. Compounds like dimethyl sulfoxide and glycerol replace water molecules and prevent crystal formation while protecting cell membranes during the freezing process. For sensitive materials like oocytes and embryos, vitrification has proven superior to older slow-freezing methods, delivering better cryosurvival and clinical outcomes.
3 Phases of Cryopreservation
The cryopreservation process has three essential stages.
- Cooling: Treating samples with cryoprotective agents and cooling them using controlled-rate freezing or rapid vitrification protocols.
- Storage: Maintaining materials at ultra-low temperatures, typically minus 80° C, minus 160° C or minus 196° C, depending on the application and intended storage duration.
- Thawing: Controlled warming returns samples to physiological temperature while maintaining viability through careful temperature management.
Applications of Cryopreservation
Now that you understand the fundamentals of cryo-freezing, you can learn how to apply it in various scientific and clinical fields.
Biobanking and Long-Term Specimen Storage
Biobanking is one of the largest and most critical applications of cryopreservation technology. The basic principles of biobanking involve collecting, processing, storing and distributing biological specimens for research purposes — and none of that works without reliable ultra-low temperature storage.
The global biobanking market reached $26.7 billion in 2025 and continues growing as precision medicine and large-scale genomic studies demand more extensive sample repositories. From cell lines and tissue samples to genetic material and serum, these facilities preserve invaluable resources for drug discovery, disease research and biotechnology development.
Stem Cell Gene Therapy and a New Era of Medicine
If you want to see the cutting edge of cryopreservation, the cell and gene therapy space is a good place to look. These treatments represent some of the most promising developments in modern medicine — and they depend entirely on cryo-freezing technology.
One example is Casgevy, the FDA-approved gene therapy for sickle cell disease. This CRISPR/Cas9 treatment works by extracting a patient's hematopoietic stem cells, editing them to increase fetal hemoglobin production and reinfusing the modified cells back into the patient. These edited cells require ultra-low-temperature cryopreservation to maintain their viability throughout the process — from post-collection storage through the editing procedure, manufacturing and transport back to the clinical site. The entire therapeutic approach would fail without precise cryopreservation to preserve these modified stem cells at every stage.
Casgevy exemplifies autologous cell therapy, which involves individually harvesting and processing each patient's cells. Cell and gene therapy manufacturers also pursue a parallel approach — allogeneic or "off-the-shelf" therapies derived from donor cells that they can manufacture in advance, store and administer to multiple patients on demand.
Making these premanufactured treatments scalable and clinically practical requires optimizing cryopreservation protocols for therapeutic cells like NK cells and CAR-T cells that must remain viable during extended storage.
Embryo Cryopreservation for In Vitro Fertilization
Embryo cryopreservation is an essential component of IVF programs, giving patients hope through tangible results. The ability to freeze embryos allows fertility clinics to:
- Maximize the success of each egg retrieval cycle.
- Preserve fertility before medical treatments.
- Give patients more control over family planning timing.
A transformation has reshaped the field in recent years. Having moved away from older slow-freezing methods that delivered inconsistent results, leading medical centers like Johns Hopkins now use vitrification as the preferred approach for embryo freezing. The improvement in outcomes has been substantial, with over 95% of frozen embryos surviving thawing.
Cryosurgery for Clinical and Dermatological Procedures
While previous applications focus on preservation, cryosurgery uses ultra-cold temperatures to achieve controlled tissue destruction. Clinicians use cryosurgery to remove abnormal tissue, including warts, precancerous skin lesions and some forms of skin cancer.
The technique works by applying liquid nitrogen or other cryogens directly to target tissue, creating localized cell death through freeze-thaw cycles. Dermatology clinics typically use cryoablation as a precise, minimally invasive alternative to surgical excision for appropriate lesions.
What Equipment Does Cryopreservation Require?
Understanding the science and applications is one thing, but implementing cryopreservation in your lab necessitates equipment designed for precise temperature control and reliability.
Controlled-Rate Freezers
When your protocol requires precise, programmable cooling curves, controlled rate freezer systems are the tool for the job. These instruments regulate temperature decreases in carefully defined steps, which are essential for applications where cell viability depends on following exact freezing protocols, like IVF, cell therapy manufacturing and biobanking.
A controlled-rate freezer lets you program custom freezing profiles that match your specific sample type and cryoprotectant protocol, ensuring reproducible results across batches.
Ultra-Low-Temperature Freezers
Ultra-low-temperature freezers operating at minus 80° C are the workhorses of sample storage in most labs. They preserve without the complexity and ongoing costs of liquid nitrogen systems, making them ideal for general laboratory use, biobanking and research specimen storage.
When evaluating options, consider factors like capacity and energy efficiency to ensure your samples remain protected.
Liquid Nitrogen Storage Vessels and Dewars
Liquid nitrogen systems allow for the coldest possible storage, at minus 196° C. Liquid nitrogen storage essentially stops biological time, allowing indefinite preservation of cells, embryos and genetic material in a state of suspended animation.
Liquid nitrogen storage is available in various configurations to match different laboratory scales and applications, ranging from small, portable dewars for sample transport to large-capacity storage vessels for major biobanking operations.
Cryostats
While the previous equipment focuses on storage, cryostats serve a different but related purpose in the cryopreservation workflow. These instruments section frozen tissue samples into thin slices for microscopic analysis, making them essential for pathology and histology labs working with cryopreserved specimens.
Understanding how cryostats work helps when setting up tissue analysis capabilities.
Order Quality Cryopreservation Equipment From New Life Scientific
New Life Scientific specializes in tested, quality-assured cryopreservation equipment at a fraction of the cost of buying new. Since 2014, we've served thousands of satisfied customers — from renowned research universities and multibillion-dollar biotech companies to startups working on shoestring budgets.
We understand how much labs rely on equipment. Our quality refurbishing process ensures performance through in-house technicians who check every instrument. We back all equipment with warranties and after-sales support, while maintaining response times of one business day or less.
Contact us today to find the appropriate solution for your lab.
